Max clock speed not working
I have just got a new pc with Gainward geforce gtx 750 Ti.
Gainward has an application installed which in called EXPERTool, which can set the core, memory clock and voltage.The memory clock for gtx 750 Ti is 5500 mhz in this chipset.The default clock speed was 2750 mhz and the Overclock menu can add 2750 mhz more (5500/2750=2) so it is 1/2 of the real speed.The problem is that when I turn it 5500, the display freezes(It is not a matter of hyperheating).The Mhz limit is +520.If i set it 560 for instance, the screen starts tearing and doing strange things.I dont know what to do.
Thanks
Note : I have a non PnP LED LCD 21.5 inch monitor( display 1920*1080 at 60 hz)